diff -r e7aa27f58ae1 -r 578830873419 emailservices/nmclientapi/src/nmapienvelopelisting_p.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/nmclientapi/src/nmapienvelopelisting_p.cpp	Fri Apr 16 14:51:52 2010 +0300
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description:
+ *
+ */
+#include "nmapiengine.h"
+#include "nmapienvelopelisting_p.h"
+
+namespace EmailClientApi
+{
+NmEnvelopeListingPrivate::NmEnvelopeListingPrivate(QObject* parent) :
+    QObject(parent), mEngine(NULL)
+{
+
+}
+
+NmEnvelopeListingPrivate::~NmEnvelopeListingPrivate()
+{
+    releaseEngine();
+}
+
+/*!
+ * \brief It initialize engine for email operations. 
+ * 
+ * When use initializeEngine need to remember release it.
+ * It return value if initialization go good.
+ * \sa releaseEngine 
+ */
+bool NmEnvelopeListingPrivate::initializeEngine()
+{
+    mEngine = NmEngine::instance();
+    return mEngine ? true : false;
+}
+
+/*!
+ * \brief It release engine for email operations.
+ * 
+ * It release Engine and return value if release go good.
+ * 
+ * \arg engine Is used to get info if engine was released, if yes, then argument have value 0.
+ * 
+ * \sa initializeEngine
+ */
+void NmEnvelopeListingPrivate::releaseEngine()
+{
+    NmEngine::releaseInstance(mEngine);
+}
+
+/*!
+ * \brief It grab envelopes from engine. 
+ * 
+ * When it start grabing, it release all old.
+ * Because it uses NmMessageEnvelope with sharedData we don't need care about release memory.
+ * 
+ * \return Count of envelopes
+ */
+qint32 NmEnvelopeListingPrivate::grabEnvelopes()
+{
+    mEnvelopes.clear();
+    mEngine->listEnvelopes(mailboxId, folderId, mEnvelopes);
+    return mEnvelopes.count();
+}
+}
+